he's getting ready to throw the Stipps under the bus. I don't think the judge will appreciate that. They are a very educated, well respected professional black couple, who 'made it' out of apartheid, and Roux is dissing them in court. And Stipp ran out of his safe home to confront danger because he thought a child was being harmed. And Roux is making fun of them now.
I think she should have interrupted Roux there. If he thinks they were lying, he should just state that and move on without the sneering or innuendo. They should have been afforded a bit more protection by the judge IMO.